The Series RHP-E/N Wall Mount Humidity/Temperature/Dew Point Transmitter
is the most versatile room transmitter on the market. The stylish housing is well vented to provide air flow across the sensor to improve measurement accuracy. The humidity and the dew point are measured using a capacitive polymer sensor
that completely recovers from 100% saturation. The humidity and dew point can
have either a current or voltage output, while the optional temperature output can
be a current, voltage, RTD or thermistor. For models with current or voltage for the
temperature output, the temperature range is field selectable.
For models with resistive thermistors or RTD outputs, please click here for temperature to resistance lookup tables.
-40 to 140°F (-40 to 60°C) for thermistor and RTD sensors.
-20 to 140°F (-28.9 to 60°C) for solid state band gap temperature sensors.
Dew Point Temperature Range:
-20 to 140°F (-28.9 to 60°C); 0 to 100°F
(-17.8 to 37.8°C); 40 to 90°F (4.4 to 32.3°C); -4 to 140°F (-20 to 60°C) field selectable
RH: Model RHP-2XXX ±2% 10 to 90% RH @ 25°C; Model RHP-3XXX ±3% 20 to
80% RH @ 25°C; Model RHP-5XXX ±5% 20 to 80% RH @ 25°C;
Thermistor temperature sensor: ±0.36°F @ 77°F (±0.2°C @ 25°C);
RTD temperature sensor: DIN Class B; ±0.54°F @ 32°F (±0.3°C @ 0°C);
Solid state band gap temperature sensor: ±0.9°F @ 77°F (±0.3°C @ 25°C).
Operating: -40 to 140°F (-40 to 60°C);
Storage: -40 to 176°F (-40 to 80°C).
Compensated Temperature Range:
-4 to 140°F (-20 to 60°C).
4-20 mA loop powered outputs: 10-35 VDC; 0-5/10V
outputs: 15-35 VDC or 15-29 VAC.
4-20 mA loop powered outputs: 4-20 mA, 2 channels for humidity/
solid state temperature sensor models (loop powered on RH). Switch selectable
RH/dew point. Switch selectable normal or reverse output; 0-5/10V outputs: 5
mA max., 2 channels for humidity/solid state temperature sensor models. Switch
selectable 0-10 V/2-10 V or 0-5 V/1-5 V output. Switch selectable RH/dew point.
Switch selectable normal or reverse output.
Solid State Band Gap Temp Sensor Output Ranges:
Switch selectable, -20 to 140°F (-28.9 to 60°C); 0 to 100°F (-17.8 to 37.8°C); 40 to 90°F (4.4 to
32.3°C); -4 to 140°F (-20 to 60°C).
Screw terminal block.
Optional LCD; Switch selectable %RH or dew point, °F/°C.
I'm looking for a dual temp. and humidity gauge for an 8" duct. I'm wanting to remote read the temp and humidity on the incoming and outgoing air to an ERV unit. The RHP-3M11-LCD was recommended to me, however, it is a direct read. What would be the correct instrument to remote read the temperature and humidity from a distance of 8 feet. The 8" duct is in the attic and I want to read the result in the down-stair hall. I don't want to record nor program the unit, just read the performance.
The sensor recommended would be the best option we have for sensing temperature and relative humidity for your application. We do not have any options with a remote display that could stretch as far as you are asking, nor are there any on the market to my knowledge. In every case, you would need to utilize a process output, in this case 4-20 mA, to transmit the readings to a remote display(s) which would accept the process signal(s). If you are just looking for a remote readout to go with the RHP sensor with no control functionality, then you could look at one of our panel meters, possibly the SPPM, DPMA, DPMW, or DPMP & DPML series panel meters. For assistance selecting an appropriate panel meter, please contact our technical support group at 219-879-8000.
Documentation (https://dwyer-inst.com/PDF_files/AQ_RHP_E_N.pdf) on p. 4 indicates that sensor can be replaced, but unable to identify P/N of replacement sensor and if to be source from Dwyer or others
The replacement sensors are no longer available. RHP-2W44-LCD is now an obsolete unit that has been replaced with the RHP-2N44-LCD series. The sensors in this unit are not field replaceable.